Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail

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1. Workflow Overview

Who is this for This workflow is designed for sales professionals, account managers, and small business owners in Japan who frequently exchange business cards. Instead of manually entering contact ...

Best for

Lead Generation automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.respondtowebhook, n8n-nodes-base.set, n8n-nodes-base.if, n8n-nodes-base.httprequest, n8n-nodes-base.code, n8n-nodes-base.googlesheets, n8n-nodes-base.slack

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Ryo Sayama.

Original n8n.io source

1.1 Workflow description

Title: Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail
Workflow name: Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail

Who is this for

This workflow is designed for sales professionals, account managers, and small business owners in Japan who frequently exchange business cards. Instead of manually entering contact details, you can instantly capture and store them by sending a photo to LINE.

What this workflow does

When a user sends a business card photo via LINE, the workflow uses Google Gemini Vision to extract key contact details — name, company, title, email, phone, and address — and saves them as a new row in Google Sheets. The team is notified in Slack, and a thank-you email is automatically sent to the new contact via Gmail. Finally, a confirmation message is sent back to the user on LINE.

How to set up

Connect your LINE Messaging API credentials in n8n
Set your LINE channel webhook URL in the LINE Developer Console
Add your Google Gemini API key (free tier available)
Share your target Google Sheet with the service account email
Connect your Slack workspace and set the target channel
Connect your Gmail account

Requirements

LINE Messaging API account (free)
Google Gemini API key (free tier)
Google Sheets (any Google account)
Slack workspace
Gmail account

How to customize

Change the Gemini prompt in the "Extract card data" node to capture additional fields. Modify the Slack message format or Gmail template to match your team's tone.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - LINE Webhook

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2

Block 2 - Respond to LINE immediately

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1

Block 3 - Set config values

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 4 - Is image message?

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 5 - Download image from LINE

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 6 - Parse Gemini JSON response

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 7 - Save contact to Google Sheets

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 8 - Notify team on Slack

Type / Role: n8n-nodes-base.slack - slack
Config choices: Version 2.3

Block 9 - Has email address?

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 10 - Send thank-you email via Gmail

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 11 - Reply success message on LINE

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 12 - Reply no-image message on LINE

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 13 - Google Gemini Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatGoogleGemini - lmChatGoogleGemini
Config choices: Version 1

Block 14 - Extract business card data with Gemini

Type / Role: @n8n/n8n-nodes-langchain.chainLlm - chainLlm
Config choices: Version 1.9

Block 15 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 16 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 18 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 19 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 20 - Sticky Note5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 21 - Sticky Note6

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail
Complexity	advanced
Nodes	21
Categories	Lead Generation, AI Summarization
Author	Ryo Sayama
Published	21 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14212/14212.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Generation workflows AI Summarization workflows

Frequently asked questions

What does Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Generation, AI Summarization use case.

Ryo Sayama

6 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.respondtowebhook n8n-nodes-base.set n8n-nodes-base.if n8n-nodes-base.httprequest n8n-nodes-base.code n8n-nodes-base.googlesheets n8n-nodes-base.slack

Complexity

advanced

Published 21 Mar 2026

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/14212/14212.json

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Scan business cards from LINE with Gemini to Sheets, Slack, and Gmail

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Who is this for

What this workflow does

How to set up

Requirements

How to customize

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - LINE Webhook

Block 2 - Respond to LINE immediately

Block 3 - Set config values

Block 4 - Is image message?

Block 5 - Download image from LINE

Block 6 - Parse Gemini JSON response

Block 7 - Save contact to Google Sheets

Block 8 - Notify team on Slack

Block 9 - Has email address?

Block 10 - Send thank-you email via Gmail

Block 11 - Reply success message on LINE

Block 12 - Reply no-image message on LINE

Block 13 - Google Gemini Chat Model

Block 14 - Extract business card data with Gemini

Block 15 - Sticky Note

Block 16 - Sticky Note1

Block 17 - Sticky Note2

Block 18 - Sticky Note3

Block 19 - Sticky Note4

Block 20 - Sticky Note5

Block 21 - Sticky Note6

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions